.bg {
  background: url(../../assets/images/dialog/bj.png) no-repeat;
  width: 100vw;
  height: 100vh;
  background-size: 100% 100%;
  position: relative;
}
.bg .bigbg {
  background: url(../../assets/images/layout/big-bj.png) no-repeat;
  width: 100vw;
  height: 100vh;
  background-size: 100% 100%;
}
.bg .btn {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
}
.bg .headerbg {
  position: absolute;
  top: 0;
  left: 0;
  background: url(../../assets/images/layout/header.png);
  width: 100%;
  height: 64px;
  background-size: 100% 100%;
}
.bg .headerbg span {
  color: #fff;
  font-size: 32px;
  line-height: 64px;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  letter-spacing: 4px;
}
.bg .footerbg {
  position: absolute;
  bottom: 0;
  left: 0;
  background: url(../../assets/images/layout/footer.png);
  width: 100%;
  height: 64px;
  background-size: 100% 100%;
}
